# LaunchCampaignError

If a campaign launch fails to raise a paywall, these are potential error types which are returned via an optional callback provided by [`NamiCampaignManager.launch`.](/sdk-reference/namicampaignmanager/launch.md)

{% tabs %}
{% tab title="Swift" %}

```swift
@objc enum LaunchCampaignError : Int {
    case DEFAULT_CAMPAIGN_NOT_FOUND = 0
    case LABELED_CAMPAIGN_NOT_FOUND = 1
    case CAMPAIGN_DATA_NOT_FOUND = 2
    case PAYWALL_ALREADY_DISPLAYED = 3
    case SDK_NOT_INITIALIZED = 4
    case PAYWALL_COULD_NOT_DISPLAY = 5
    case URL_CAMPAIGN_NOT_FOUND = 6
    case PRODUCT_DATA_NOT_FOUND = 7
    case PRODUCT_GROUPS_NOT_FOUND = 8
}
```

{% endtab %}

{% tab title="Kotlin" %}

```kotlin
enum class LaunchCampaignError : NamiError {
    SDK_NOT_INITIALIZED,
    DEFAULT_CAMPAIGN_NOT_FOUND,
    LABELED_CAMPAIGN_NOT_FOUND,
    PAYWALL_ALREADY_DISPLAYED,
    CAMPAIGN_DATA_NOT_FOUND
 }
```

{% endtab %}

{% tab title="Flutter" %}

```dart
enum LaunchCampaignError {
  SDK_NOT_INITIALIZED,
  DEFAULT_CAMPAIGN_NOT_FOUND,
  LABELED_CAMPAIGN_NOT_FOUND,
  PAYWALL_ALREADY_DISPLAYED,
  CAMPAIGN_DATA_NOT_FOUND
}
```

{% endtab %}

{% tab title="React Native" %}

```jsx
export enum LaunchCampaignError {
  DEFAULT_CAMPAIGN_NOT_FOUND = 0,
  LABELED_CAMPAIGN_NOT_FOUND = 1,
  CAMPAIGN_DATA_NOT_FOUND = 2,
  PAYWALL_ALREADY_DISPLAYED = 3,
  SDK_NOT_INITIALIZED = 4,
}
```

{% endtab %}

{% tab title="Unity" %}

```c
public enum LaunchCampaignError
{
    DefaultCampaignNotFound,
    LabeledCampaignNotFound,
    CampaignDataNotFound,
    PaywallAlreadyDisplayed,
    SDKNotInitialized
}
```

{% endtab %}
{% endtabs %}

* `SDK_NOT_INITIALIZED` - SDK must be initialized via \[Nami.configure] before launching a campaign
* `DEFAULT_CAMPAIGN_NOT_FOUND` - No live default campaign could be launched.
* `LABELED_CAMPAIGN_NOT_FOUND` - No live campaign could be launched for the requested label.
* `PAYWALL_ALREADY_DISPLAYED` - Cannot launch a campaign, because a paywall is currently on screen
* `CAMPAIGN_DATA_NOT_FOUND` - No campaign found
* `PAYWALL_COULD_NOT_DISPLAY` - Could not display the paywall
* `URL_CAMPAIGN_NOT_FOUND` - No live campaign for this deeplink URL was found
* `PRODUCT_DATA_NOT_FOUND`- No product data could be loaded from the app store
* `PRODUCT_GROUPS_NOT_FOUND` - Product groups passed into launch don't match what paywall expects


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